# New self-gravito-acoustic mode in degenerate quantum plasmas

## TL;DR

This paper predicts a new self-gravito-acoustic mode in cold self-gravitating degenerate quantum plasmas, which depends on the interplay of gravitational and degenerate pressures, with implications for white dwarf physics.

## Contribution

It introduces and theoretically describes a novel perturbation mode in degenerate quantum plasmas, absent when degenerate pressure of light particles is neglected.

## Key findings

- Prediction of a new SGAM in SGDQPs
- SGAM depends on degenerate pressure of light particles
- Application to white dwarf plasma

## Abstract

The existence of a new perturbation mode [`self-gravito-acoustic mode' (SGAM)] in cold self-gravitating degenerate quantum plasmas (SGDQPs) is theoretically predicted. This new SGAM is developed in the perturbed SGDQPs, in which the compression is mainly provided by the self-gravitational pressure of the heavy particle species, and the rarefaction is mainly provided by the degenerate pressure of the light particle species. The SGAM is a new perturbation mode since it completely disappears if the degenerate pressure of the light particle species is neglected. The prediction of this new SGAM is applied in a white dwarf SGDQP.